期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2020/01/001
关键词
dark matter theory; galaxy dynamics; dark matter simulations; galaxy formation
资金
- NASA through the Einstein Postdoctoral Fellowship [PF7-180164]
- Chandra X-ray Center
- NASA [NAS8-03060]
- DOE [DESC0007968]
- Cottrell Scholar Program through the Research Corporation for Science Advancement
- FAS Division of Science, Research Computing Group at Harvard University
- Kavli Institute for Cosmological Physics at the University of Chicago through Kavli Foundation
We present an in-depth exploration of the phenomenon of dynamical friction in a universe where the dark matter is composed entirely of so-called Fuzzy Dark Matter (FDM), ultralight bosons of mass m similar to O (10(-22)) eV. We review the classical treatment of dynamical friction before presenting analytic results in the case of FDM for point masses, extended mass distributions, and FDM backgrounds with finite velocity dispersion. We then test these results against a large suite of fully non-linear simulations that allow us to assess the regime of applicability of the analytic results. We apply these results to a variety of astrophysical problems of interest, including infalling satellites in a galactic dark matter background, and determine that (1) for FDM masses m greater than or similar to 10(-21) eV c(-2), the timing problem of the Fornax dwarf spheroidal's globular clusters is no longer solved and (2) the effects of FDM on the process of dynamical friction for satellites of total mass M and relative velocity v(rel) should require detailed numerical simulations for (M/10(9) M-circle dot) (m/10(-22) eV) (100 kms(-1)/v(rel)) similar to 1, parameters which would lie outside the validated range of applicability of any currently developed analytic theory, due to transient wave structures in the time-dependent regime.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据